1、这是叙述过去的事件,而且有准确的时间,因此全文的基本时态确定为一般过去时.用一般现在时不合适.
2、return 是动词,前面已经有了take a bus所以这里连续用动词是错误的,改为back home,这里没必要加our.
3、noodle一般用复数形式,改为noodles.
4、午餐是lunch,dinner改为lunch,和早餐晚餐保持一致.
改后全文：
On Sunday,I usually got up at 7:00.Then I
washed my face and brushed my teeth.After I had breakfast,I went shopping
with my mother.We went to the supermarket by bus.We bought some vegetables
and took a bus back home.We had noodles for lunch.After lunch,I slept
for a little while.Then I did my homework from 14:00 to 17:00.After supper,I
watched TV or read some books.I went to bed at 21:00.It’s my Sunday.